Ok, I'm still going to say pullet for your OE. Her comb is a little red, but not big at all. I am however going to lean towards cockerel for your silkie. I see a tinge of red at the base of his comb and it's a decent size for his age. But every chicken is different in its quickness of growth and silkies are HARD.
Saddle feathers for your OE will start coming in in about two to three weeks. Pointy ones will tell the tale on if we are correct. Streamers will start to show on your silkies head if a boy, although they are harder to see sometimes.
Keep us posted, I'd love to know what they are.